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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 7 |
| 3 | 85 |
| 4 | 1701 |
| 5 | 51031 |
| 6 | 2143303 |
| 7 | 120024969 |
| 8 | 8641797769 |
| 9 | 777761799211 |
| 10 | 85553797913211 |
| 11 | 11293101324543853 |
| 12 | 1761723806628841069 |
| 13 | 320633732806449074559 |
| 14 | 67333083889354305657391 |
| 15 | 16159940133445033357773841 |
| 16 | 4395503716297049073314484753 |
[0,1,7,85,1701,51031,2143303,120024969,8641797769, 777761799211,85553797913211,11293101324543853, 1761723806628841069,320633732806449074559, 67333083889354305657391, 16159940133445033357773841, 4395503716297049073314484753] |